[Free Registration/Login Required] This lesson introduces the cross product method for solving proportions. It also connects the mathematical content to real-world applications.

Dr. Math helps a student discover the meaning of the mean proportional of two numbers. Detailed explanation with examples.

A concise graphing calculator lesson on proportions. Detailed examples, demonstrations of functions, and practice problems included. Acrobat Reader required.

This task challenges a student to demonstrate understanding of ratios and proportions. Students must determine a generalized rule from an understanding of ratio and proportional reasoning in a given real-world context.

Seventh graders use the multiplication property of equality to justify their solution to a ratio problem.

Create a worksheet to assess students understanding of unit rates and unit fractions.

Students learn about ratios and percentages in the tutorial. The mathematics resource consists of examples and practice problems with answers.

This lesson will introduce the means and extremes of a proportion, and demonstrate how to use cross multiplication to determine if two ratios are equivalent. It is 5 of 8 in the series titled "Equivalent Ratios."

This lesson will introduce the means and extremes of a proportion, and demonstrate how to use cross multiplication to determine if two ratios are equivalent. It is 8 of 8 in the series titled "Equivalent Ratios."

Students learn how to solve proportions. The mathematics resource consists of examples and practice problems with answers.

The tutorial investigates proportions and ratios. The lesson includes explanations on solving problems with ratios using cross multiplication.

[Free Registration/Login may be required to access all resource tools.] Recognize unit scale as a ratio between units of measure of scale dimension to actual dimension.

[Free Registration/Login Required] This flipchart is a Jeopardy style review for Ratio and Proportion. Comes form the McDougal Littell Geometry book.

Website which strengthens the conceptual connection between scale drawings and ratios through an activity lesson plan.

[Free Registration/Login Required] This lesson contains notes and examples for instructing how to solve proportions. Begins with relations to equivalent fractions, and then gets into solving algebraically using cross products. It...

The purpose of this task is to see how well students students understand and reason with ratios. This task was adapted from problem #14 on the 2011 American Mathematics Competition (AMC) 8 Test. Aligns with 7.RP.A.3. The site provides a...

The triathlon is a physically gruelling challenge. Can you work out which athlete burnt the most calories? This activity provides a real-life context for working with proportionality, speed, rates, and units of measurement and is aimed...

[Free Registration/Login may be required to access all resource tools.] Write fractions as percents by using proportions and equal ratios.

In this real-world context, 6th graders are given the ratio of Jim's money to Jesse's and the amounts they have spent so far on a road trip, and they must calculate what each person had at the start of the trip. Aligns with 6.RP.A.3.

The purpose of this task is to give middle schoolers an opportunity to solve a multi-step ratio problem that can be approached in many ways. The site includes a task and the solution.

Using a tape diagram is one of the key models for ratios and proportions.

Print or create worksheets or flashcards to assess students' understanding of ratio concepts.

Find out how to calculate the Golden Ratio in this exercise.

The purpose of this task is to give students an opportunity to solve a multi-step percentage problem that can be approached in many ways. Because the tax and tip in this problem are a fixed percentage of the cost of the meal, the total...